[issue20784] 'collections.abc' is no longer defined when collections is imported

[Antoine Pitrou]

Antoine Pitrou added the comment:

A quick grep indicates at least the following modules use os.path but only import os:
bdb, binhex, cgitb, compileall, cProfile, doctest, filecmp, fileinput, fnmatch, ftplib, gettext, glob, imghdr, imp, inspect, linecache, mailbox, mimetypes, modulefinder, netrc, optparse, pdb, platform, profile, pstats, pyclbr, pydoc, shlex, site, sndhdr, ssl, subprocess, tabnanny, tarfile, trace, uuid, uu, webbrowser, zipfile.

So, it's a very common idiom.

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<http://bugs.python.org/issue20784>
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